Crossing the Line Twice: Sly's discussion about Immortal being a racist manatee pedophile in Sly Breaks Friends.
Fan Dumb: During Sly Breaks Friends Season 2 Episode 4, Immortal fell silent for a while after taking enough of Sly's abuse and called Sly on his cellphone during the recording, telling Sly that he was on his way over to Sly's house to kill him. Many fans took this seriously, which caused Sly to have to put an annotation in the video, saying that him and Immortal were friends and they do this every day.
Most Wonderful Sound: Whenever Sly sings, sometimes. Which is justified by Sly being a singer.
Nightmare Fuel: During one of the Minecraft custom maps Sly, Nova, and SSoHPKC played, there was a portion where they had to jump onto small platforms above a floor of spider spawners. After falling down a few times and getting mobbed by spiders, Minecraft eventually spawned so many spiders that they all turned invisible and started climbing up the walls.
Replacement Scrappy: Mitty in Minecraft Marriage. Many comments have said that they don't like how she sounds or her attitude towards the game.